@article{oai:ritsumei.repo.nii.ac.jp:00011479,
 author = {Otsuka, Kozo},
 journal = {Ritsumeikan Journal of Asia Pacific Studies, Ritsumeikan Journal of Asia Pacific Studies},
 month = {Sep},
 pages = {64--76},
 title = {Scientific research and research collaboration may remedy slowed innovation in Japan due to  diminishing returns to knowledge},
 volume = {33},
 year = {2014}
}